Normal fetal heart sound is per minute?

ESIC Nursing Officer 2016 (shift-1)

Obstetrics and Midwifery Nursing

Easy

Appeared in: ESIC Nursing Officer 2016 (shift-1)

Explanation

The standard accepted range for a normal fetal heart rate (FHR) in a term fetus is 120 to 160 beats per minute (bpm).
This range reflects a healthy, well-oxygenated fetus with a properly functioning autonomic nervous system.
According to Gray's Anatomy for Students (SRC_3), the heart rate is about 140 beats per minute throughout fetal life.
Rates outside this range, such as tachycardia (above 160 bpm) or bradycardia (below 110-120 bpm), can be indicators of fetal distress and require immediate nursing assessment and intervention.

Option A: A heart rate of 90-105 bpm is classified as fetal bradycardia. This is a non-reassuring sign that may indicate significant fetal hypoxia or other complications.
Option B: This range is too low. While the upper limit (120 bpm) touches the normal range, a sustained rate below 110 bpm is defined as bradycardia and is a cause for concern.
Option C: This range is too narrow and incomplete. It correctly identifies the lower end of the normal range but excludes the upper normal values from 131 to 160 bpm.

Visual 1: Chart - A table showing the classification of fetal heart rate: Bradycardia (<110 bpm), Normal (120-160 bpm), and Tachycardia (>160 bpm). This provides a quick reference for the different categories.
Visual 2: Diagram - An image of a Cardiotocography (CTG) strip displaying a normal fetal heart rate tracing between 120 and 160 bpm with moderate variability. This helps students visualize what a normal FHR looks like in a clinical setting.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Normal fetal heart rate (FHR) range as background academic context rather than a clinical decision trigger.
Monitoring FHR is a fundamental nursing responsibility during labor and delivery to assess fetal well-being and detect signs of distress early.
An abnormal FHR is one of the first signs of fetal hypoxia. Prompt identification and intervention can prevent adverse neonatal outcomes.
What if? If the FHR suddenly drops to 80 bpm and stays there, this is severe bradycardia. The nurse's first actions should be to reposition the mother to her left side, administer oxygen, increase IV fluids, and immediately notify the healthcare provider, as this could indicate an emergency like a cord prolapse.

How to Approach the Question

This is a factual recall question that tests your knowledge of standard reference values in obstetrics.
Identify the keywords in the question: 'Normal fetal heart sound'.
Recall the established normal range for fetal heart rate, which is a fundamental piece of knowledge for nursing students.
Compare the recalled range (120-160 bpm) with the given options.
Eliminate options that fall outside this range (too low, too high, or too narrow).
Select the option that perfectly matches the standard normal range.

Concept Tested & Keywords

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